L50 Injection Lubricator - Parker

Introduction:
The Watts L50 Injection Lubricator is specifically
designed to lubricate air tools, cylinders, valves and
other pneumatic equipment. It is a positive feed device
that delivers a precisely metered amount of oil to the
tool, via a capillary tube, every time the tool is turned
on. The L50 has a built-in air flow sensor which, when
activated, causes a pressurized piston to fire oil into the
capillary tube. Therefore, it is completely self contained
and requires no outside power source, time, etc. Note: If
the L50 is to be used in a continuous air flow application,
it should be equipped with the pulse generator option to
ensure adequate oil delivery.
Operation:
Every time air flow starts, the sensor piston (1) (see
Figure A) is pushed down and allows a pilot pressure
to flow through port (2) which drives the module piston
(3) and the metering plunger (4) to the right. As the
plunger passes by the oil supply port (5), it forces oil into
the metering tube (6) which in turn lifts the check valve
(7) and forces the same quantity of oil into the inner
sight glass, it drives the flow indicator (8) to the right (a
positive indication of oil flow) and then flows up through
the annular area between the inner and outer sight glass
(9). It next flows down through the out port (10) and
the capillary adapter (11) to the capillary (12) adapted
for internal feed. When air flow stops, the sensor piston
is returned by its spring to the initial no-flow position,
and the pilot pressure behind the metering piston is
exhausted to atmosphere through the exhaust valve (13)
and exhaust port. When air is exhausted, the metering
piston spring returns the piston and plunger to initial
position. As can be seen by referring to Figure A, the
amount of oil injected into the system is determined by
the distance the metering plunger (4) travels into the
metering tube (6). The distance it travels to the right
(into the tube) determines the quantity of oil that is forced
L50 Injection Lubricator
Installation, Operating and Maintenance Instructions
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WARNING
To avoid unpredictable system behavior that can cause personal injury
and property damage:
• Disconnect electrical supply (when necessary) before installation,
servicing, or conversion.
• Disconnect air supply and depressurize all air lines connected to this
product before installation, servicing, or conversion.
• Operate within the manufacturer’s specified pressure, temperature,
and other conditions listed in these instructions.
• Medium must be moisture-free if ambient temperature is below
freezing.
• Service according to procedures listed in these instructions.
• Installation, service, and conversion of these products must be
performed by knowledgeable personnel who understand how
pneumatic products are to be applied.
• After installation, servicing, or conversion, air and electrical supplies
(when necessary) should be connected and the product tested for
proper function and leakage. If audible leakage is present, or the
product does not operate properly, do not put into use.
• Warnings and specifications on the product should not be covered by
paint, etc. If masking is not possible, contact your local representative
for replacement labels.
out through the check valve (7) and into the system.
Since the module piston always travels a set distance
from point (A) to (B), oil feed rate is adjusted by varying
the protruded length of the metering plunger. The longer
the plunger, the greater the travel and the greater the
oil feed per cycle. An adjusting knob (14) is provided
to adjust the plunger length. To operate, the knob must
first be pulled into the unlocked position. Then, as the
knob is turned in a clockwise direction, the adjusting
screw (15) moves to the right and extends the metering
plunger (4). Since the module/air piston (3) remains
stationary, the extended length of the metering plunger
is increased. Therefore, the next time the module is fired
(pressurized), the metering plunger will travel a longer
distance into the metering tube (6) so more oil will be
forced through the check valve and into the system.
Conversely, counter-clockwise rotation of the adjustment
knob (14) will shorten the extended length of the plunger
and decrease the amount of oil feed.
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Figure A: L50 Section View
3 4 A B 13 5 6 7
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WARNING
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FAILURE OR IMPROPER SELECTION OR IMPROPER USE OF THE
PRODUCTS AND/OR SYSTEMS DESCRIBED HEREIN OR RELATED ITEMS
CAN CAUSE DEATH, PERSONAL INJURY AND PROPERTY DAMAGE.
This document and other information from The Company, its subsidiaries
and authorized distributors provide product and/or system options for further
investigation by users having technical expertise. It is important that you analyze
all aspects of your application, including consequences of any failure and review
the information concerning the product or systems in the current product catalog.
Due to the variety of operating conditions and applications for these products
or systems, the user, through its own analysis and testing, is solely responsible
for making the final selection of the products and systems and assuring that all
performance, safety and warning requirements of the application are met.
The products described herein, including without limitation, product features,
specifications, designs, availability and pricing, are subject to change by The
Company and its subsidiaries at any time without notice.
EXTRA COPIES OF THESE INSTRUCTIONS ARE AVAILABLE FOR INCLUSION
IN EQUIPMENT / MAINTENANCE MANUALS THAT UTILIZE THESE PRODUCTS.
CONTACT YOUR LOCAL REPRESENTATIVE.
IS-L50 1
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